Pipeline gas cut-off valve convenient to open

Abstract

The utility model particularly relates to the technical field of fuel gas cut-off valves, and discloses a pipeline fuel gas cut-off valve convenient to open, which comprises a valve seat, a corrugated pipe is fixedly arranged at one end of the valve seat, a first flange plate is fixedly arranged at the end part of the corrugated pipe, a plurality of grooves are formed in the inner side wall of the corrugated pipe at equal intervals, and a second flange plate is fixedly arranged at the other end of the corrugated pipe. A first mounting seat is fixedly arranged at the top end of the valve seat, a piston rod is inserted in the middle of the first mounting seat, a sealing cover is fixedly arranged at the bottom end of the piston rod, a second spring is wound on the outer surface, close to the sealing cover, of the piston rod, and a limiting seat is fixedly arranged on the inner side wall, close to the sealing cover, of the valve seat. The valve seat, the corrugated pipe and the first flange plate are arranged, and the multiple grooves are formed in the corrugated pipe at equal intervals, so that the wall thickness of the corrugated pipe is evenly distributed, compression deformation of the corrugated pipe is facilitated, and the distance between the valve seat and the first flange plate is conveniently adjusted; therefore, the mounting adaptability of the valve seat and the safety in the using process are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cut-off valves, and in particular relates to a pipeline gas cut-off valve which is easy to open. Background Art

[0002] The gas shut-off valve is a new type of safety device for gas pipeline projects. The shut-off valve is mainly used in the following occasions: connected to the combustible gas leakage monitoring instrument. When the gas alarm detects a combustible gas leak, it automatically and quickly closes the main gas supply valve, cuts off the gas supply, and promptly stops the occurrence of a serious accident. The gas shut-off valve is installed in the gas supply network of the city or factory, which can be centrally controlled in the central control room and remotely controlled to urgently shut down the pipeline gas supply at the accident site.

[0003] Existing pipeline gas shut-off valves are usually rigidly connected with flanges and bolts. During the installation of the shut-off valve, the flange spacing between the pipelines and the external dimensions of the shut-off valve may deviate, which may lead to installation mismatch. At the same time, thermal expansion and contraction may occur when the pipeline is connected to the shut-off valve, which may cause damage to the flange interface, thereby increasing the safety hazards of the shut-off valve. Utility Model Content

[0004] The utility model provides a pipeline gas shut-off valve which is easy to open, and aims to solve the problem that the existing pipeline gas shut-off valves are usually rigidly connected by flanges and bolts, and the shut-off valves may not be installed properly during installation due to the deviation between the flange spacing between the pipelines and the external dimensions of the shut-off valves. At the same time, thermal expansion and contraction may occur when the pipeline is connected to the shut-off valve, which may cause damage to the flange interface, thereby increasing the safety hazards of the shut-off valve.

[0005] The utility model is implemented as follows: a pipeline gas shut-off valve that is easy to open comprises a valve seat, one end of the valve seat is fixedly provided with a bellows, the end of the bellows is fixedly provided with a flange, a plurality of grooves are evenly spaced on the inner side wall of the bellows, a mounting seat is fixedly provided on the top of the valve seat, a piston rod is inserted in the middle of the mounting seat, a sealing cover is fixedly provided on the bottom end of the piston rod, a spring is wound around the outer surface of the piston rod close to the sealing cover, a limit seat is fixedly provided on the inner side wall of the valve seat close to the sealing cover, a limit groove is provided on the surface of the limit seat for the sealing cover to be clamped, and the inner size of the limit groove is matched with the outer size of the limit seat.

[0006] Preferably, a flange seat three is fixedly provided at the other end of the valve seat, and the external dimensions of the flange seat three are matched with the external dimensions of the flange plate one.

[0007] Preferably, the valve seat is fixedly connected to the bellows to form an integrated structure, and the valve seat is communicated with the interior of the bellows to facilitate the flow of gas.

[0008] Preferably, an inner liner is fixedly provided on the inner side wall of the corrugated tube close to the groove, and the inner liner is made of polyethylene and is in a ring shape.

[0009] Preferably, a second slot is provided in the middle of the first mounting seat for the piston rod to be plugged in, an end cap is fixed to the top end of the piston rod, and the second slot is communicated with the inside of the valve seat, thereby improving the convenience of plugging in the piston rod.

[0010] Preferably, a mounting seat 2 is fixedly provided on the side wall of the piston rod, a slot 1 is provided inside the mounting seat 2, a clamping seat is clamped inside the slot 1, and a spring coil is wound on the outer surface of the clamping seat, thereby improving the stability of the spring coil installation.

[0011] Preferably, a flange seat 2 is fixedly provided at the end of the mounting seat 2 away from the mounting seat 1, an end cover is fixedly provided at the end of the flange seat 2, and a connecting terminal is fixedly provided on the side wall of the end cover, thereby improving the sealing performance of the slot 1.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] Firstly, by providing a valve seat, a bellows and a flange, a plurality of grooves are provided at equal intervals inside the bellows, so that the wall thickness of the bellows is evenly distributed, which facilitates the compression and deformation of the bellows, thereby facilitating the adjustment of the distance between the valve seat and the flange, thereby improving the adaptability of the valve seat installation and the safety during use; secondly, by providing an inner liner, the inner liner is made of polyethylene and is fixed on the inner wall of the bellows by hot melting, thereby improving the wall thickness and sealing of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a side view stereoscopic structural schematic diagram of the utility model.

[0016] Figure 3 It is a front view cross-sectional structural schematic diagram of the utility model.

[0017] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the valve seat of the utility model.

[0018] The accompanying drawings are marked as follows: 1. valve seat; 2. bellows; 3. flange one; 4. mounting seat one; 5. piston rod; 6. mounting seat two; 7. flange seat two; 8. flange seat three; 9. end cover; 10. terminal; 11. groove; 12. sealing cover; 13. limit seat; 14. limit groove; 15. notch one; 16. holder; 17. spring coil; 18. liner; 19. end cap; 20. spring two; 21. notch two. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] See also Figure 1-4 The utility model provides an embodiment of a pipeline gas shut-off valve that is easy to open, characterized in that it includes a valve seat 1, a bellows 2 is fixedly arranged at one end of the valve seat 1, the valve seat 1 and the bellows 2 are fixedly connected to form an integrated structure, the valve seat 1 and the inside of the bellows 2 are connected, which is convenient for gas circulation, and a plurality of grooves 11 are evenly spaced on the inner wall of the bellows 2, a flange 3 is fixedly arranged at the end of the bellows 2, and a flange seat 3 8 is fixedly arranged at the other end of the valve seat 1, and the external dimensions of the flange seat 3 8 are matched with the external dimensions of the flange 3, and the grooves 11 are evenly distributed so that the wall thickness of the bellows 2 is evenly distributed, which facilitates the compression deformation of the bellows 2, thereby facilitating the adjustment of the distance between the valve seat 1 and the flange 3, thereby improving The adaptability of the valve seat 1 for installation is improved. When the temperature changes and causes the pipeline to shrink and deform, the groove 11 can be extended by stretching, so as to compensate for the size of the pipeline deformation, thereby reducing the large pulling force on the connection between the valve seat 1 and the flange seat 3 8, thereby improving the safety of the valve seat 1 during use. A mounting seat 4 is fixedly provided on the top of the valve seat 1, a piston rod 5 is inserted in the middle of the mounting seat 4, a sealing cover 12 is fixedly provided on the bottom end of the piston rod 5, a spring 20 is wound around the outer surface of the piston rod 5 near the sealing cover 12, a limit seat 13 is fixedly provided on the inner side wall of the valve seat 1 near the sealing cover 12, a limit groove 14 is provided on the surface of the limit seat 13 for the sealing cover 12 to be clamped, and the inner size of the limit groove 14 is adapted to the outer size of the limit seat 13.

[0022] An inner liner 18 is fixedly disposed on the inner side wall of the corrugated tube 2 close to the groove 11 . The inner liner 18 is made of polyethylene and is in a ring shape.

[0023] A notch 21 is provided in the middle of the mounting seat 1 4 for the piston rod 5 to be plugged in, and an end cap 19 is fixedly provided on the top of the piston rod 5, so that the piston rod 5 can be lifted up to reset the sealing cover 12. The notch 21 is communicated with the interior of the valve seat 1, which improves the convenience of plugging in the piston rod 5. A mounting seat 2 6 is fixedly provided on the side wall of the piston rod 5, and a notch 15 is provided inside the mounting seat 2 6. A clamping seat 16 is clamped inside the notch 15, and a spring coil 17 is wound on the outer surface of the clamping seat 16, which improves the stability of the installation of the spring coil 17. When the spring coil 17 is powered on, a magnetic force can be generated to absorb the piston rod 5, thereby limiting the downward sliding of the piston rod 5, so that the limit groove 14 remains open for convenient gas circulation. A flange seat 2 7 is fixedly provided at the end of the mounting seat 2 6 away from the mounting seat 1 4, and an end cover 9 is fixedly provided at the end of the flange seat 2 7. A wiring terminal 10 is fixedly provided on the side wall of the end cover 9 for connection and coupling, thereby improving the sealing of the notch 15.

[0024] Working principle: When using this kind of easy-to-open pipeline gas shut-off valve, the operator connects an external power supply to make the flange seat three 8 face the direction of gas flow, plugs the power line into the terminal 10, and connects the spring coil 17 and the gas alarm through the wire. When the spring coil 17 is powered on, the spring coil 17 can generate magnetic force, which absorbs the piston rod 5 through the magnetic force, so that the piston rod 5 offsets its own weight and the elastic force of the spring two 20, so that the limit groove 14 remains open to facilitate the flow of gas in the pipeline. When the gas alarm senses a gas leak and sounds an alarm, the power supply of the spring coil 17 is cut off. The gas alarm is a prior art and will not be described in detail here, so that the magnetic force disappears, and the piston rod 5 moves downward under the action of its own weight and the elastic force of the spring two 20. The closed limit groove 14, the gas pressure acts on the top of the sealing cover 12 to form a pressure difference, further improving the stability of the sealing cover 12 clamping, thereby cutting off the gas supply and ensuring safety. When the operator is required to install the cut-off valve, a number of grooves 11 are evenly spaced inside the bellows 2, so that the wall thickness of the bellows 2 is evenly distributed, which facilitates the compression and deformation of the bellows 2, thereby facilitating the adjustment of the distance between the valve seat 1 and the flange 3, thereby improving the adaptability of the valve seat 1 installation. When the temperature changes and causes the pipeline to shrink and deform, the groove 11 can be stretched to extend the distance, thereby compensating for the size of the pipeline deformation, thereby reducing the large pulling force on the connection between the valve seat 1 and the flange seat 3 8, thereby improving the safety of the valve seat 1 during use.

[0025] Secondly, the inner liner 18 is made of polyethylene and is fixed on the inner wall of the corrugated tube 2 by hot melting, thereby improving the wall thickness and sealing performance of the corrugated tube 2.

[0026] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0027] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0028] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0029] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A pipeline gas shut-off valve that is easy to open, characterized in that: The invention comprises a valve seat (1): a bellows (2) is fixedly provided at one end of the valve seat (1), a flange (3) is fixedly provided at the end of the bellows (2), a plurality of grooves (11) are provided at equal intervals on the inner wall of the bellows (2), a mounting seat (4) is fixedly provided at the top end of the valve seat (1), a piston rod (5) is inserted in the middle of the mounting seat (4), a sealing cover (12) is fixedly provided at the bottom end of the piston rod (5), a spring (20) is wound around the outer surface of the piston rod (5) close to the sealing cover (12), a limit seat (13) is fixedly provided on the inner wall of the valve seat (1) close to the sealing cover (12), a limit groove (14) is provided on the surface of the limit seat (13) for the sealing cover (12) to be clamped, and the inner size of the limit groove (14) is matched with the outer size of the limit seat (13).

2. The easy-to-open pipeline gas shut-off valve according to claim 1, characterized in that: A flange seat three (8) is fixedly provided at the other end of the valve seat (1), and the external dimensions of the flange seat three (8) are compatible with the external dimensions of the flange plate one (3).

3. The easy-to-open pipeline gas shut-off valve according to claim 2, characterized in that: The valve seat (1) and the bellows (2) are fixedly connected to form an integrated structure, and the valve seat (1) and the interior of the bellows (2) are communicated with each other.

4. The easy-to-open pipeline gas shut-off valve according to claim 3, characterized in that: An inner liner (18) is fixedly arranged on the inner side wall of the corrugated tube (2) close to the groove (11); the inner liner (18) is made of polyethylene and is in a circular ring shape.

5. The easy-to-open pipeline gas shut-off valve according to claim 1, characterized in that: A second slot (21) is provided in the middle of the first mounting seat (4) for the piston rod (5) to be inserted into, an end cap (19) is fixed to the top end of the piston rod (5), and the second slot (21) is communicated with the interior of the valve seat (1).

6. The easy-to-open pipeline gas shut-off valve according to claim 5, characterized in that: A second mounting seat (6) is fixedly provided on the side wall of the piston rod (5), a first notch (15) is provided inside the second mounting seat (6), a clamping seat (16) is clamped inside the first notch (15), and a spring coil (17) is wound around the outer surface of the clamping seat (16).

7. The easy-to-open pipeline gas shut-off valve according to claim 6, characterized in that: A flange seat 2 (7) is fixedly provided at the end of the second mounting seat (6) away from the first mounting seat (4), an end cover (9) is fixedly provided at the end of the second flange seat (7), and a connecting terminal (10) is fixedly provided on the side wall of the end cover (9).

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